Cylinder-grinding attachment for engine-lathes.



C. H. SCHQLER 5L nw. NEWTON. CYLINDER GRINDING ATTACHMENT FUR ENGINELATHES APPLICATION FILED MAH 5. I9I5. LI.,LII91EI aented. July 18, 1916.

A /a /v l. i I /Z IfI Rijn

` '.-ground-i'lush'and true with respect to the AUrnrnn PATENT orificecnAnLnsn. sonoma- AND FRANK W; Ni t 'w'.roN,` 'or' nINNEAroLIs,niNNEsorA,

AssIGNons, mabianca' A Nn 'MESNE ASSIGNMENTS, 'ro eoNTINEN'rAL Germanac'oMPANY, or M INNEAroLIs, MINNESOTA, A CORPORATION;

CYLINDER-GRINDINGATTACHMENT Fon ENGINELATHAES.

Specication of Letters Patent. Patented 1y 189 1916 Application'meaMarch 5'; '1915;' serial-Nq. 12,376.

To all whom may concern.'

Be it known-that we, CHARLES H.' Sonoma United States, 'residing atMinneapolis, -i'n the county of Hennepin and State of Minne- Sota, haveinvented certain new and useful Improvements in'- 4CylinderGr'rind ingAt* tachments for Engine-Lathes, of whichfthe following i's aspecification.

Our invention relates to an attachment .to engine lathesforgrindingcylinders, and has for its object to provide a'member which may bedirectly connected with the spindle of the lathe and set relativeto theaXia-l'center of said spindle so as tobe turned through circumferencesof varying diameter accord;

ing 4to the diameter of the cylinder Vto be ground, together. with'-independent means for rotating the grindi,ng-head independ-A ently ofthe spindle. We also provide meansV for securing thecylinder to beground upon the lathe-carriage so that the turning and l'work-feedingelements of the lathe are emany pointed out' iaith@ @1aims.

longitudinal section taken through ourl grinding attachment. Fig. 3 -isan enlarged 'l plo'yed in connection with our mechanism.

The full objects and advantages of our-in! vention will appear 'inconnection liviththe detailed description .thereof andareparticuperspective detail view of4 theA adjusting As shown, thelathecarriage 1 has bolted .thereto a` face-plate 11 provided with anthereon the "surface of said face-plate away` 'from' the spindle 45opening .12, which is' centered -with respect tothe lathe-spindle 13.-yThe face-plate 11 1s face of the carriage 10, so thatwhen bolted ill beper en'dicula'r to the' aX-isoi sai'd spin`le lThe ase-plate 15 of thecylinder tojbe ground is first trued upin' the-usual way and thenisb'olted to the faceplate 11 'so that the center of the cylinder 32formed on plate 20;

[A4-,is fast' 'on `sleeve is4 Vby a belt llifrom'ncther Acou ntershaftthan tli'at"'from which a belty 46 ldrives plate -halisa Vbevelee'lvflange 2.1 engageable' over flange 18 and' a `right-angledfia/ nge 22at the other side of said plate and parallel with flange 21.v The flange22 is vspaced `from .the beveled guide 19, -and in this s ace is mounteda binden-strip 23 having a eveled face 24 engaging the beveled guide 19.The

binder-strip is securedzto the plate 2O by bolts 25, whlch extendthrough slots 26 in the plate 20. Set bolts 27 extending through'lia-nge 22 serveto set the binder-strip 23 firmly against guide fia-nge19 and lock the plateQO upon the head 16. The head 16- has i A formedtherein a channel 28- which is yb'etween and parallel with guides 18 and19.

In this' channel is a. block 29 securely bolted 'to head 20, andamandrel 30, lsaid mandrelv 30' in turn being secured pin 31 to. a hubthreaded .aperture extending througlrthe same parallel to guides' 18,19, through..

ieblock 28 has a which extends threaded shaft 33 on-av hand screw 34 'atone-side of head 16.. 'The -s'crew 34'has .thereon a scale 35 bywhichthe position ofmandrel 30, with referenceto the.

indicated. v

The mandrel 3() has' 'thereon-a' pair of oppositely-disposed conicalbearing-members 36 and 37, the bearing member-37 preferably beingseparate from the'mandrel' and held axial center of lathe-spindle13,-'1nayfbe sleeve 39 is provided with bearing-blocks 40' and 41engageable with the bearing members 36 and-37 and 'each' rovded' withoilfholes 42, through which oi from a 'central chamthereon byvineans ofnut and washer 38. A

be'r 43, within'sleeve 39 and surrounding;

mandrel 30,y may pass tothe 4different parts' 'of the bearing surfaces36 and 37.- The sleeve 39, together withthebearing-mem bers 40 and 41,therefor, is adapted to turn upon the bearing surfaces 36'and` 37 ofman-f.l

drel w30 and4 yis held for rotationabout the axial center, of mandrel.30.`

riven ulley tightener affengagesvbeltfaf and ,com en- Sp/aside t; fueanni @een @regnen T13, as g 'will always be the case when the machine isin operation. A grinder-head t8 is secured upon a neck L19 of a cap 50screwed upon the end of sleeve 39 by means of a nut 51, and, of course,the grinder-head may be changed as desired.

In operation, after the face-plate 15 of the cylinder has been trued andplaned, the same is secured in position `upon the plate 11, which isbolted to the lathe-carriage 10, as indicated in Fig.: 1. iBy means ofthe hand screw 34 the plate 20 is set so that when spindle 13 is driventhe grinder 48 will be caused to travel about the interior surface ofthe cylinder. When the machine is being driven the grinder' will berapidly rotated with sleeve 39 about mandrel 30, and

atthe same time carried about the inside of the cylinder by reason ofthe rotation of the plate'lf) and the sleeve 39 carried thereby with thelathespindle 13. These two rotations being in the same direction theaggregate friction speed of the engaging portion of the. grinder Savillbe exceedingly high, so that a rapid and ellieient grinding action Willtake-place. The latheearriage is, of course. operated by the usualfeeding mechanism of the lathe to feed the cylinder longitudinally alongthe sleeve 39, so that the grinding action continues progressively fromthe open outer end to the inner end of the cylinder.

The advantages of our invention ivill be obvious, The mechanism is atrue attachment, as itis immediately and readily applied to an existingengine lathe without rearranging the parts thereof or requiring anythingexceptingthe removal of the chuck plate and the bolting of plate 11 tothe lathe-carriage. The grindenhead 4S is it self given theditl'erential rotative Inovement Jfor causing it to travel about theinterior Wall of the c vlinder instead of rotat ing the cylinder, as isdone with the usual form ot' grinder mechanism. The cylinder plate 15must be. trued and planed in any event, and, this having been done` ameans is provided ot readily and ellicientlypositi oning the cylinderfor the grinding action by merely bolting the. cylinder-base 15 to theplate 11. V

We claim:

1. A cylinder grindingr attachment for engine lathes comprising meansfor supporting said attachment from the lathe spindle, grinding meansenveloping said supporting means and rotatable thereon. means to adjustthe supporting means laterally at right angles to the lathe spindle, andmeans to independently drive the grinding means.

2. A cylinder grinding attachment for engine lathes comprising asupporting rod attached to the lathe spindle parallel with the axis ofthe lathe and adjustable laterally at right angles to said lathe axis. a.sleeve rotatable on said supporting rod and having a grinding wheelattached to it, and means for independently driving said sleeve.

3. A cylinder grinding attachment for engine lathes comprising asupporting rod attached to the lathe spindle. parallel with the axis ofthe lathe and adjustable laterally at right angles to said lathe axis. asleeve rotatable on said supporting` rod and having a grindingr Wheelattached to it. and a pulley on said sleeve for drivin;r it.

4. A cylinder grinffling attachment for engine lathes comprising a headsecured to the lathe spindle, a pair of parallel guides on said headin aplane at right angles to the spindle.. a plate slidably mounted on saidguides, means for adjusting said platev along said guides. a supportingrod parallel with the lathe axis and attached to said plate. a sleeverotatably mounted upon said rod and carrying a grinding wheel, and meansto drive said sleeve.

5. A Vcylinder grinding attaclunent for cngine lathes comprising asupl'iorting rod attached to the lathe spindle parallel with the axis ofthe lathe and adjustable laterali)1 at right angles to said lathe axis.a fixed conical bearing on the end of said supporting rod nearest thelathe spindle. a removable conical bearing on the tree. end of saidsupporting rod, a sleeve rotatable about said rod on said conicalbearings. a eap carrying a grinding wheel attachable to said sleeve, andmeans to independently drive the sleeve` G. A cylinder grindingattachment for engine lathes comprising a head secured' to thelathe-spindle. a mandrel mounted upon said head. means for adjustingsaid mandrel transversely of the head. a grinder-spindle journaled uponsaid mandrel. a pulley on said grinder-spindle, a belt for driving saidpulley and grinder-spindle while the same is being'turned by thelathe-slvindle. and a belt' tightener engaging said belt fo1 co1npcnsating for the ditiercntial movement of said pulley. 'A

In testimony whereof we .our signatures in presence of two witnes.rv sf.

CHARLES H. "ClllOLllR FRANK W. NIIWTQN.

Witnesses F. A. lll'nrrrzmar. H. A. BOWMAN.

